<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
        <div id="app-5">
            <p>{{ message }}</p>
            <button v-on:click="reverseMessage">逆转消息</button>
        </div>

        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <script>
            var app5 = new Vue({
                el: '#app-5',
                data: {
                    message: 'Hello Vue.js!'
                },
                methods: {
                    reverseMessage: function () {
                    this.message = this.message.split('').reverse().join('')
                    }
                }
            })
        </script>
</body>
</html>